CN106062345A

CN106062345A - Control apparatus for internal combustion engine and control method therefor

Info

Publication number: CN106062345A
Application number: CN201480076748.8A
Authority: CN
Inventors: 三河谦太郎
Original assignee: Hitachi Automotive Systems Ltd
Current assignee: Hitachi Astemo Ltd
Priority date: 2014-03-04
Filing date: 2014-09-25
Publication date: 2016-10-26
Anticipated expiration: 2034-09-25
Also published as: DE112014006435T5; JP2015166587A; CN106062345B; US20170074179A1; US9976498B2; WO2015132993A1; JP6220288B2

Abstract

The present invention pertains to an internal combustion engine which is provided with: a VTC controller for controlling the drive of a variable valve timing device; and an engine control module (ECM) for calculating valve timing control orders and transferring the same. The VTC controller and the ECM each detect whether there is an abnormality in a communication circuit used in transferring the control orders or not. When an abnormality is detected, the VTC controller and the ECM set target values for an abnormal state respectively by the same characteristics, and carry out control actions on the basis of the target values for an abnormal state. Thus, even when an abnormality occurs in the communication circuit of the control orders, the operation of the engine can be inhibited from deteriorating.

Description

The control device of internal combustion engine and control method

Technical field

The present invention relates to the control that the variable valve timing apparatus of a kind of air valve correct-timing variable to making internal combustion engine is controlled Device processed and control method.

Background technology

Patent Document 1 discloses a kind of valve timing adjustment device, it is to utilize the torque of motor to adjust to start The valve timing adjustment device of the valve timing of machine, has and receives the control signal of control circuit generation and control letter based on described Motor is led to electrically driven (operated) drive circuit by the desired value number utilizing the motor revolution of frequency representation, in described frequency not up to Stop during threshold value being energized to described motor.

Prior art literature

Patent documentation

Patent documentation 1:(Japan) No. 4269338 publication of special permission

Summary of the invention

Invent technical problem to be solved

But, if the driving of the actuator of the variable valve timing apparatus that abends based on control instruction, then there is gas Door timing is back to the situation of the default location of machinery due to cam counteracting force.

But, according to engine operating status when detecting control instruction exception, exist and be changed to machinery valve timing Default location thus deviation is suitable for valve timing of operating condition now, infringement starting performance and combustion stability etc. are started The probability of machine behavior in service.

The present invention makes in view of the above problems, it is therefore intended that provide control device and the control of a kind of internal combustion engine Method, the controlling device and control method electromotor behavior in service can be suppressed in the control instruction of valve timing of this internal combustion engine Decline when input occurs abnormal.

For solving the technical scheme of technical problem

To this end, the control device of the present invention has process portion, this process portion is being sent out from the input of outside control instruction During raw exception, the assigned position of default location variable valve timing apparatus controlled to deviation machinery.

It addition, the control method of the present invention comprises: detection control instruction is with or without the step of input exception；Described detecting The step of the assigned position of default location when input is abnormal, described variable valve timing apparatus controlled to deviation machinery.

The effect of invention

According to foregoing invention, by the setting of assigned position, compared with the situation of the default location being back to machinery, it is possible to The decline of suppression behavior in service.

Accompanying drawing explanation

Fig. 1 shows the system construction drawing of the internal combustion engine in embodiment of the present invention.

Fig. 2 shows the block diagram of an example of the function of the VTC controller in embodiment of the present invention and ECM.

Fig. 3 shows the block diagram of an example of the function of the VTC controller in embodiment of the present invention and ECM.

Fig. 4 shows the engine speed under the communication abnormality state in embodiment of the present invention and target phase angles The figure of one example of dependency.

Fig. 5 shows the engine speed under the communication abnormality state in embodiment of the present invention and target phase angles The figure of one example of dependency.

Fig. 6 shows variable quantity and the change of the engine speed under the communication abnormality state in embodiment of the present invention The figure of one example of the dependency of direction and target phase angles.

Fig. 7 shows the block diagram of an example of the function of the VTC controller in embodiment of the present invention and ECM.

Fig. 8 shows the engine speed under the communication abnormality state in embodiment of the present invention and cell voltage and mesh The figure of one example of the dependency at mark phase angle.

Fig. 9 shows the block diagram of an example of the function of the VTC controller in embodiment of the present invention and ECM.

Figure 10 be the change of the target phase angles under the communication abnormality state being illustrated in embodiment of the present invention time Sequence figure.

Detailed description of the invention

Hereinafter, embodiments of the present invention are illustrated.

Fig. 1 shows the figure of an example of the internal combustion engine of the control device and method using the present invention.

Internal combustion engine 101 uses as the power source being equipped on vehicle.

The suction air capacity of the intake air flow QA being provided with detection internal combustion engine 101 in the air intake duct 102 of internal combustion engine 101 passes Sensor 103.

Inlet valve 105 switchs the air inlet of the combustor 104 of each cylinder.

At the air inlet 102a of the upstream side of inlet valve 105, it is configured with Fuelinjection nozzle 106 for each cylinder.

Note, although the internal combustion engine 101 shown in Fig. 1 is sprayed fuel by Fuelinjection nozzle 106 in air inlet 102a So-called hole jet type internal combustion engine, but can be set to directly be sprayed in combustor 104 institute of fuel by Fuelinjection nozzle 106 The Incylinder direct injection internal combustion engine of meaning.

The fuel sprayed by Fuelinjection nozzle 106 sucks in combustor 104 via inlet valve 105 together with air, utilizes The spark ignition of spark plug 107 and burning of getting angry, this burning piston 108 is depressed by the pressure produced to bent axle 109, thus drives Dynamic crankshaft 109 rotates.

It addition, exhaust valve 110 switchs the air vent of combustor 104, by opening exhaust valve 110 by combustor 104 Discharge gas to discharge to exhaustor 111.

Exhaustor 111 is provided with the catalyst 112 with three-way catalyst etc., utilizes catalyst 112 clean Change aerofluxus.

Inlet valve 105 carries out opening action along with the rotation of the admission cam shaft 115a being driven rotation by bent axle 109.Separately Outward, exhaust valve 110 carries out opening action along with the rotation of the exhaust cam shaft 115b being driven rotation by bent axle 109.

Variable valve timing apparatus 114, as an example, is DYN dynamic variable valve timing apparatus, and it utilizes work Motor for actuator makes admission cam shaft 115a change relative to the relative rotation phase angle of bent axle 109, thus makes air inlet The valve timing of the phase place at valve operation angle of door 105, i.e. inlet valve 105 changes to direction in advance or retarding direction continuously.

Note, as DYN dynamic variable valve timing apparatus 114, such as Japanese Unexamined Patent Publication 2013-227919 can be used Mechanism disclosed in number publication.It addition, variable valve timing apparatus 114 is not limited to DYN dynamic mechanism, it is possible to suitably adopt With the known mechanism such as fluid pressure type or electromagnetic type.

It addition, on the spark plug 107 arranged for each cylinder, be mounted directly the supply igniting of oriented spark plug 107 respectively The ignition module 116 of energy.Ignition module 116 has ignition coil and to the power crystalline substance being controlled to the energising of ignition coil Body pipe.

It addition, as control unit, be provided with as the first control unit driving control variable valve timing apparatus 114 VTC controller 201A and the second control unit or external control as control Fuelinjection nozzle 106 with ignition module 116 etc. fill Engine control module (ECM) 201B put.

VTC controller 201A and engine control module 201B are respectively provided with the miniature calculating including CPU, RAM, ROM etc. Machine, by carrying out calculating process according to the program being pre-stored within the memorizeies such as ROM, thus enters the operational ton of various devices Row calculates and exports.

VTC controller 201A has the drive circuits such as the inverter of the motor driving variable valve timing apparatus 114.

It addition, VTC controller 201A Yu ECM201B is can utilize controller local area network (CAN) 211 mutually to carry out data The mode of transmission is constituted.

Note, as on the CAN211 of telecommunication circuit, in addition to VTC controller 201A, ECM201B, be also associated with Such as control the AT controller etc. of the automatic transmission combined with internal combustion engine 101.

As the various sensors of the operating condition of detection internal combustion engine 101, in addition to sucking air amount sensor 103, It is additionally provided with the crankshaft angle sensor 203 of the anglec of rotation signal POS of output crank shaft 109, the entering amount of detection gas pedal 207, changes The accelerator open degree sensor 206 of the i.e. accelerator open degree ACC of speech, the cam of anglec of rotation signal CAM of output admission cam shaft 115a Angle transducer 204, detection internal combustion engine 101 cooling water temperature TW cooling-water temperature sensor 208, be arranged at catalyst 112 Upstream side exhaustor 111 in based in aerofluxus oxygen concentration detect air-fuel ratio AF air-fuel ratio sensor 209, detection The motor rotation angle sensor 210 etc. of rotation angle θ of motor as the actuator of variable valve timing apparatus 114.

Further, VTC controller 201A and ECM201B signal based on above-mentioned various sensors, fortune as internal combustion engine 101 The off/on signal etc. of the ignition switch 205 of the main switch turned and stop, the operating condition of detection internal combustion engine 101, and based on starting Machine operating condition is implemented control and is processed.

Fig. 2 shows the block diagram of an example of the function of VTC controller 201A and ECM201B.

ECM201B input crankshaft angle sensor 203 and cam angle sensor 204, although eliminate diagram in fig. 2, but Also input sucks air amount sensor 103, accelerator open degree sensor 206, cooling-water temperature sensor 208, the letter of air-fuel ratio sensor 209 Number, also input the signal of ignition switch 205.

Further, the first object calculating part 501 of ECM201B operates based on the electromotor such as engine load, engine speed State, calculates target phase angles TGPAb of variable valve timing apparatus 114.This target phase angles TGPAb is equivalent to Target Valve Timing, desired value, the control instruction value etc. of valve timing.

The data of target phase angles TGPAb exported by first object calculating part 501 export to switching part 502.

The data of target phase angles TGPAa used when transmitting occur abnormal via the data of CAN211 and first object The data of target phase angles TGPAb that calculating part 501 calculates are input to switching part 502 together, and would indicate that via The data transmission of CAN211 has N/R signal i.e. to select command signal as any one value specified in two desired values Signal is input to switching part 502.

Further, in the case of transmitting via the data of CAN211 and being normally carried out, i.e. can be via CAN211 to VTC Under the state of the data that controller 201A correctly transmits TGPA, switching part 502 selects first object calculating part 501 to calculate Target phase angles TGPAb is as final desired value TGPAf output.

On the other hand, transmit via the data of CAN211 occur abnormal in the case of, i.e. can not be via CAN211 Under the state of the data correctly transmitting TGPA to VTC controller 201A, switching part 502 selects the conduct of target phase angles TGPAa Final desired value TGPAf output.

Second target calculating part 503 calculates the mesh used in the case of transmitting generation extremely via the data of CAN211 Mark phase angle TGPAa also exports.

It addition, based on the signal etc. come from VTC controller 201A transmission via CAN211, abnormality determination unit 504 judges warp Had without exception by the data transmission of CAN211.

Target phase angles TGPAf that switching part 502 is exported is transmitted to CAN signal sending part 505, and by as control Information processed is transmitted to the engine control section 506 carrying out fuel injection control and the control duration of ignition etc..

The data of target phase angles TGPAf are connect to the signal of VTC controller 201A by signal transmission unit 505 via CAN211 Receipts portion 601 transmits.

In VTC controller 201A, signal receiving part 601 data of target phase angles TGPAf received are exported Switching part 602.

The data of target phase angles TGPAa used when transmitting occur abnormal via the data of CAN211 with from The data of target phase angles TGPAf that ECM201B transmission comes are input to switching part 602 together, and would indicate that via The data transmission of CAN211 has N/R signal DIA to be input to cut as the signal of any one value specified in two desired values Change portion 602.

Further, in the case of transmitting via the data of CAN211 and being normally carried out, i.e. can via CAN211 correctly The state of the data receiving target phase angles TGPA from ECM201B side joint, switching part 602 selects the mesh come from ECM201B transmission Mark phase angle TGPAf is as final desired value TGPA output.

On the other hand, transmit via the data of CAN211 occur abnormal in the case of, i.e. can not be via CAN211 Correctly receiving from ECM201B side joint the state of data of target phase angles TGPA, switching part 602 selects target phase angles TGPAa is as final desired value TGPA output.

3rd target calculating part 603 calculates and exports target phase angles TGPAa.

Here, target phase angles TGPAa of the 3rd target calculating part 603 output of VTC controller 201A side and ECM201B Target phase angles TGPAa of the second target calculating part 503 output of side is identical value.In other words, the 3rd target calculating part 603 Calculate by identical characteristics with the second target calculating part 503 and export target phase angles TGPAa.

It addition, based on via CAN211 from ECM201B transmission come signal etc., abnormality determination unit 604 judge via The data transmission of CAN211 has without exception.

That is, VTC controller 201A and ECM201B is respectively provided with under the abnormality being set in data transmission the target used The function of phase angle TGPAa, and individually judge utilize CAN211 data transmission have without exception, and, VTC controller 201A and ECM201B is respectively provided with the desired value when desired value and abnormality that select ECM201B to calculate based on this result of determination The function of either one.

The data of target phase angles TGPA of switching part 602 output are imported in drive control part 605.

The detected value ACPA at rotatable phase angle and the data of target phase angles TGPA by together be input to drive controller 605 In.Further, drive control part 605 by make detected value ACPA close in the way of target phase angles TGPA, such as according to target phase The deviation of angle TGPA and detected value ACPA calculates the target current of the motor 114a of variable valve timing apparatus 114.

Angle detection 606 inputs the anglec of rotation signal POS of crankshaft angle sensor 203, the rotation of cam angle sensor 204 Angle signal CAM, the anglec of rotation signal θ of motor rotation angle sensor 210, and based on these signal detection admission cam shafts 115a is relative to the rotatable phase angle of bent axle 109, and is exported to drive control part 605 by the detected value ACPA at rotatable phase angle.

The anglec of rotation signal POS of crankshaft angle sensor 203 of angle detection 606 input and cam angle sensor 204 Anglec of rotation signal CAM is that the duplicate circuit (loop) 507 from ECM201B sends via special holding wire 212a, 212b Signal to VTC controller 201A.

The replication loop 507 of ECM201B is directly connected to crankshaft angle sensor 203 and cam angle sensor 204, will input The anglec of rotation signal POS, CAM replicate and be sent in the angle detection 606 of VTC controller 201A.

That is, VTC controller 201A and ECM201B is in the way of just inputting the anglec of rotation signal POS, CAM not via CAN211 Constituting, even if in the case of CAN211 occurs extremely, VTC controller 201A and ECM201B also is able to input anglec of rotation signal POS, CAM use as the information of control.

Here, can be formed by utilize VTC controller 201A to replicate the anglec of rotation signal POS, CAM via special signal The structure that alignment ECM201B sends.

PWM output unit 607 inputs the target current exported by drive control part 605, determines PWM (arteries and veins based on target current Rush width modulated (Pulse Width Modulation)) control in dutycycle, and utilize this dutycycle PWM control letter The energising of number control motor 114a.

VTC controller 201A and ECM201B action in the following manner shown in the functional block diagram of Fig. 2.

When being normally carried out via the data transmission of CAN211, the abnormality determination unit 504 and VTC control of ECM201B The abnormality determination unit 604 of device 201A processed judges that CAN communication is normal jointly.

Then, receiving the normal judgement of CAN211, first object calculating part 501 is calculated by the switching part 502 of ECM201B Target phase angles TGPAb output, this target phase angles TGPAb is transferred in VTC controller 201A via normal CAN211.

The switching part 602 of VTC controller 201A receives the normal judgement of CAN211, exports from ECM201B via CAN211 Target phase angles TGPAb that transmission comes, drive control part 605 is based on target phase angles TGPAb, i.e. based on be set as can basis The desired value that engine operating status changes, drives and controls variable valve timing apparatus 114.

Thus, it is controlled as the optimum corresponding with engine operating status the valve timing of inlet valve 105.

On the other hand, under the abnormality transmitting the CAN211 that cannot be normally carried out via the data of CAN211, VTC is controlled Device 201A processed cannot receive the data of target phase angles TGPA via CAN211 from ECM201B side joint.

Now, jointly judged by the abnormality determination unit 604 of the abnormality determination unit 504 and VTC controller 201A of ECM201B CAN communication is abnormal, and the switching part 502 of ECM201B selects and exports the target phase angles of the second target calculating part 503 output TGPAa, and the switching part 602 of VTC controller 201A select and export the 3rd target calculating part 603 output target phase angles TGPAa。

Here, the 3rd target calculating part 603 of the second target calculating part 503 and VTC controller 201A side of ECM201B side Calculate and export target phase angles TGPAa of identical value, and, target phase angles TGPAa is calculated as VVT dress Put the fixed position of the default location of the deviation machinery of 114.

In making the variable valve timing apparatus 114 of air valve correct-timing variable of inlet valve 105, default location is by retainer The maximum delay side of the phase variable scope mechanically determined, target phase angles TGPAa is as from this default location Big delay position to lateral deviation in advance from phase angle, be prestored to depositing of ECM201B side and VTC controller 201A side respectively In reservoir.

If VTC controller 201A can not from ECM201B side input target phase angles TGPA, i.e. valve timing control refer to When making, stop the control to variable valve timing apparatus 114, then can be affected by cam counteracting force and cause inlet valve The valve timing of 105 returns to the default location as maximum delay position.In this case, ratio maximum delay position is being required Under the engine operating status of valve timing in advance, behavior in service becomes to decline.

Such as, when making internal combustion engine 101 start, require than maximum delay position in advance in the valve timing of inlet valve 105 In the case of, if causing being fixed on maximum delay position valve timing owing to CAN is abnormal, then cannot start internal combustion engine 101. It addition, under the acceleration mode making the rotating speed of internal combustion engine 101 increase, if causing be fixed on valve timing owing to CAN is abnormal , then there is the probability that combustion stability declines owing to valve overlap amount becomes very few grade in maximum delay position.

It is therefoie, for example, as internal combustion engine 101 can be made to start, additionally be able to fully suppress the flameholding of internal combustion engine 101 Property decline fixing valve timing, use target phase angles TGPAa.So, under CAN abnormality, VTC controller 201A base In target phase angles TGPAa, variable valve timing apparatus 114 is controlled.

Therefore, even if CAN occurs abnormal, it is possible to so that internal combustion engine 101 starts, it addition, internal combustion engine 101 can be made persistently to transport Turning, within can making, combustion engine 101 moves to safe place as the vehicle of power source.

Further, it is assumed that when CAN occurs abnormal, also select target phase angles TGPAa to replace normal condition in ECM201B side Under target phase angles TGPAb, ECM201B to this target phase angles TGPAa control variable valve timing apparatus 114, due to right The fuel injection amount of internal combustion engine 101 and the duration of ignition etc. are controlled, therefore, it is possible to make according to actual in VTC controller 201A For controlling the valve timing control internal combustion engine 101 of target.

It addition, ECM201B such as have by target phase angles TGPA with detect based on the anglec of rotation signal POS, CAM Actual rotatable phase compares thus diagnoses the merit of the fault of variable valve timing apparatus 114 and/or VTC controller 201A In the case of energy, even if CAN211 occurs abnormal, due to can by VTC controller 201A really as the gas controlling target Door timing is used as diagnostic message, therefore, it is possible to the abnormal error diagnosis that suppression is to Valve timing control system.

It is therefoie, for example, have when judging that Valve timing control system has abnormal at ECM201B, implement to cut off to variable In the case of the function that the power supply supply of the drive circuit of valve timing apparatus 114 etc. process, can in VTC controller 201A side By variable valve timing apparatus 114 to desired value control, on the other hand can suppress to cut off the power supply to drive circuit mistakenly Supply.

If supplying to the power supply of drive circuit here, cut off, then can return to maximum delay position valve timing, therefore pass through Can suppress to cut off mistakenly and supply to the power supply of drive circuit, it is possible to utilize VTC controller 201A by valve timing to target Phase angle TGPAa controls, by so, it is also possible to the decline of the electromotor behavior in service under suppression CAN abnormality.

Note, just controlling changeable air valve making VTC controller 201 owing to CAN is abnormal based on target phase angles TGPAa Time device 114 in the case of, the increase of the load of internal combustion engine 101 can be limited to lower than time normal by ECM201B, can fill Internal combustion engine 101 is made to operate in dividing the suppression engine load range that behavior in service declines.

In the example shown in the functional block diagram of Fig. 2, target phase angles TGPAa used under the abnormality of CAN211 It is the same fixed value, but can be set as target phase angles TGPAa can changing according to engine operating status.

The functional block diagram of Fig. 3 shows that the second target calculating part 503 and the 3rd target calculating part 603 are by target phase angles TGPAa is set as an example of the structure that can change according to engine operating status.

Note, in figure 3, for the module identical with the module shown in Fig. 2, use same reference and omit in detail Explanation.

In figure 3, ECM201B has based on the anglec of rotation signal POS calculating electromotor exported by cam angle sensor 203 The speed calculation portion 508 of rotating speed NE, the data of engine speed NE calculated are calculated by speed calculation portion 508 to the second target Portion 503 exports.

Second target calculating part 503 has function based on engine speed NE change target phase angles TGPAa.

It addition, VTC controller 201A has sends, based on from the replication loop 507 of ECM201B, the anglec of rotation signal POS of coming Calculate the speed calculation portion 608 of engine speed NE, speed calculation portion 608 by the data of engine speed NE that calculate to the Three target calculating parts 603 export.

3rd target calculating part 603, as the second target calculating part 503, has and changes target based on engine speed NE The function of phase angle TGPAa.

Here, the second target calculating part 503 and the 3rd target calculating part 603 are by target phase based on engine speed NE Angle TGPAa setting property is set as identical, sets same target phase angles under the conditions of same engine speed NE respectively TGPAa。

Fig. 4 shows in the second target calculating part 503 and the 3rd target calculating part 603, based on engine speed NE The example that the setting of target phase angles TGPAa processes, is to set multiple different target phase in the region of engine speed NE The example of angle TGPAa.

Fig. 4 shows target phase angles TGPAa common in the second target calculating part 503 and the 3rd target calculating part 603 Setting property, TDC represents that top dead centre, BDC represent that lower dead center, IVO represent the opening time of inlet valve 105, and IVC represents air inlet The shut-in time of door 105, EVO represents the opening time of exhaust valve 110, and EVC represents the shut-in time of exhaust valve 110.

As shown in Figure 4, the second target calculating part 503 and multiple regions that the 3rd target calculating part 603 is engine speed In each storage target phase angles TGPAa, and select the target of velocity band that engine speed now met Phase angle TGPAa exports.

In the example as depicted in fig. 4, it is shown that engine speed is divided into three regions, set in three regions The example of different target phase angles TGPAa.

In the diagram, engine speed NE be the first rotary speed area of below first threshold be to turn than the idling of internal combustion engine 101 Speed is lower, meet the rotary speed area for the launch state making internal combustion engine 101 start.

It addition, engine speed NE is higher than first threshold and lower than Second Threshold (first threshold < Second Threshold) second Rotary speed area is the rotating speed district meeting the idle state of internal combustion engine 101, in other words no load condition or light load conditions Territory.

It addition, engine speed NE threeth rotary speed area higher than Second Threshold is to meet the idling shape than internal combustion engine 101 The higher middle load condition of state load, the rotary speed area of higher load condition.

Further, target calculating part 503,603 is in the first rotary speed area meeting internal combustion engine 101 starting state, by making The valve timing of inlet valve 105 shifts to an earlier date than default location, make the shut-in time IVC of inlet valve 105 near lower dead center BDC, So that the suction air capacity under starting state is more than default location, so that it is guaranteed that the starting performance of internal combustion engine 101.

In other words, target calculating part 503,603 is by being set as target phase angles TGPAa than default location more by advance Side is so that shut-in time IVC position near lower dead center BDC, thus also is able to start internal combustion engine under CAN abnormality 101。

Such as, there is such a case that inlet valve 105 during variable valve timing apparatus 114 to be set to default location Shut-in time IVC in the position postponed than lower dead center BDC it is thus possible to the mode realizing the Miller cycle of late release sets phase The variable range of parallactic angle, select under the operating condition of certain low speed etc. phase angle near default location or default location to Increase fuel efficiency.

In the case of the variable range so setting phase angle, when closed between the acquiescence that postpones than lower dead center BDC of IVC Position, the charging efficiency step-down of internal combustion engine 101.Therefore, if in the state that the valve timing of inlet valve 105 is set to default location Under start, then cannot obtain the suction air capacity of abundance under the starting state of internal combustion engine 101 so that internal combustion engine 101 Starting performance declines, and there is the probability that internal combustion engine 101 cannot be made to start.

Therefore, meeting the first rotary speed area, (it is internal combustion that this first rotary speed area is estimated to be to target calculating part 503,603 The starting state of machine 101) in the case of, by target phase angles TGPAa is set to compared to default location more by side in advance from And make the shut-in time IVC of the inlet valve 105 shut-in time IVC than default location closer to the phase angle of lower dead center BDC, can be The suction air capacity of abundance is obtained, so that internal combustion engine 101 can stably start under starting state.

It addition, target calculating part 503,603 makes inlet valve at the second rotary speed area of the idling mode meeting internal combustion engine 101 The valve timing of 105 shifts to an earlier date than default location, but less than the first rotary speed area from the lead of default location, it is suppressed that valve Overlap becomes excessive situation.Thus, it can be ensured that the combustion stability in idle running under CAN abnormality, it is thus achieved that enough Anti-flame-out property.

Further, the 3rd rotary speed area of engine load conditions to be increased than idling mode is being met, due to electromotor Rotating ratio idling mode is high, therefore by making valve overlap amount be able to ensure that more greatly combustion stability.

Therefore, at the 3rd rotary speed area, target phase angles TGPAa is set to ratio and meets second by target calculating part 503,603 Position and ratio that the situation of rotary speed area shifts to an earlier date meet the position that the situation of the first rotary speed area postpones, thus compare and meet second The situation of rotary speed area expands valve overlap amount, it is ensured that the combustion stability under middle load condition, it is thus achieved that enough anti-put out Fire.

As it has been described above, under CAN abnormality, if making target phase angles TGPAa according to the uneven of engine speed Change, then the difference of the requirement valve timing that can be caused according to the difference of engine speed, actual valve timing is made Go out change, compared with the situation that target phase angles TGPAa is set to fixed value, it is possible to improve the internal combustion engine under CAN abnormality The electromotor behaviors in service such as the starting performance of 101 and combustion stability.

Noting, in the example shown in Figure 4, the rotary speed area after being started by internal combustion engine 101 is divided into idling rotary area With two regions of non-idling rotary area, but rotary speed area can be divided thinner so that target phase angles TGPAa is with more Little span change.

It addition, for example, it is possible to be divided into the low speed rotation region and rotating ratio idling comprising launch state and idling mode High the two region, high speed rotating region, and target calculating part 503,603 according to engine speed by target phase angles TGPAa Switch to two kinds, the region of engine speed can be divided and make arbitrary setting.

Even if it addition, under identical launch state, the starting that the starting under cold state and warming-up are under state is wanted The valve timing asked is the most different, therefore as it is shown in figure 5, the engine speed under launch state can be divided into cold shape The high speed rotating region that low speed rotation region under state and warming-up are under state, the difference according to starting rotating speed makes target phase Angle TGPAa is different.

A disorder of internal organs i.e., under a cold state, the friction of internal combustion engine 101 is relatively big, causes starting rotating ratio to be at warming-up Under state to play disorder of internal organs low, be therefore the situation in the low speed rotation region of cold state starting rotating speed to meet can be estimated as Under, set target phase angles TGPAa of the starting being suitable under cold state.

On the other hand, warming-up be over the i.e. internal combustion engine 101 of state the relatively low state of friction under, owing to starting rotating ratio cold Height under machine starting state, is therefore starting rotating speed to meet can be estimated as warming-up to be over the situation in high speed rotating region of state Under, target calculating part 503,603 sets and is suitable for warming-up and is over target phase angles TGPAa of the starting under state.

Such as, target calculating part 503,603 is under cold post-start state, in order to ensure starting performance, by target phase angles TGPAa is set as that the shut-in time IVC of inlet valve 105 is in the lead near lower dead center BDC, under warming-up is over state Play disorder of internal organs, in order to suppress the generation of advanced ignition, by make the shut-in time IVC of inlet valve 105 than under cold post-start state more Postpone after lower dead center BDC, make to be effectively compressed low under cold post-start state frequently.

It addition, in the example shown in Fig. 4, Fig. 5, target calculating part 503,603 is according to the high undercut of engine speed NE Change target phase angles TGPAa, and as shown in Figure 6, target calculating part 503,603 can be the change according to engine speed NE, Specifically it is the structure switching target phase angles TGPAa according to change direction and/or variable quantity.

In the example shown in Fig. 6, change based on engine speed NE marks off the situation under the conditions of five, target meter Calculation portion 503,603 switches target phase angles TGPAa by each situation.

Here, set these five conditions of first condition, second condition, third condition, fourth condition and fifth condition, its Middle first condition is the acceleration mode that engine speed begins to ramp up from idling speed, and second condition is that engine speed is from rising After state start to idling speed reduce deceleration regime, third condition from start rotating speed start to idling speed rise Turning idling mode soon, fourth condition is the high-temperature start-up state starting rotating speed to rise to height from engine stop-state, Article 5 Part is to the low usual starting state starting rotating speed to rise from engine stop-state.

Further, in the case of first condition is set up, combustion stability is maintained in order to expand valve overlap amount, target Calculating part 503,603 makes target phase angles TGPAa more lean on side and applicable idling mode, valve overlap in advance from than default location Measure less target phase angles TGPAa to start to do and change in advance, to guarantee the combustion stability under acceleration mode.

It addition, in the case of second condition is set up, target calculating part 503,603 is from the bigger target phase of valve overlap amount Parallactic angle TGPAa to applicable idling speed state, target phase angles TGPAa that valve overlap amount is less do delay variation, with really Protect the combustion stability under deceleration regime.

It addition, in the case of third condition is set up, in other words, in the case of being estimated as being in warming-up process, mesh Mark calculating part 503,603 sets target phase angles TGPAa shifted to an earlier date than the valve timing in the idle running after warming-up, by carrying Before make valve overlap expand, utilize expand after valve overlap make suction gas generation wind direction reverse, utilize suction gas wind The gasification of fuel is promoted, it is ensured that the combustion stability in warming-up process to reversing.

It addition, fourth condition is to start in the case of rotating ratio low temperature～cold starting condition height in other words from stopping shape The condition that rising variable quantity is big, internal combustion engine 101 that is that estimate under starting state is in warming-up completion status of the rotating speed that state starts.? Under the conditions of Gai, target calculating part 503,603 set inlet valve 105 shut-in time IVC with than cold post-start state time further from Target phase angles TGPAa that the mode of lower dead center BDC postpones, thus makes effective compression ratio reduce, it is achieved to press down advanced ignition System etc..

It addition, fifth condition is to start rotating ratio high-temperature start-up state low in other words from the rising change of the rotating speed stopping beginning Change amount is little, deduce starting state under engine temperature be the condition of low temperature～hot conditions.Under this condition, target calculates Portion 503,603, by making target phase angles TGPAa than in the case of fourth condition more in advance, makes the shut-in time IVC of inlet valve 105 Near lower dead center BDC, the increase of the charging efficiency by thus causing guarantees motor starting characteristic.

Note, although the first condition shown in Fig. 6 is to rotate the situation about rising that rotates started from idling, but such as The rotation rising condition both feelings rotating the rising condition that rotates started from idling and starting from intermediate speed can be divided into Condition, rotating of being equally divided into from high rotating speed to intermediate speed reduces and between intermediate speed to idling speed Rotate and reduce by two kinds of situations.

It addition, as shown in Figure 4,5, 6, VTC controller 201A and ECM201B can be following structure: except can be based on Beyond target phase angles TGPAa is changed by engine speed NE, it is additionally based upon the cell voltage VB being used as to start motor power and becomes More target phase angles TGPAa.

Fig. 7 is to change target phase angles TGPAa under CAN abnormality according to engine speed NE and cell voltage VB In the case of the functional block diagram of VTC controller 201A and ECM201B.

The functional block diagram of Fig. 7 is input to the 3rd target at the signal of cell voltage VB together with the signal of engine speed NE Calculating part 603 is different from Fig. 3 with this point in the second target calculating part 503, the 3rd target calculating part 603 shown in Fig. 7 and Second target calculating part 503 is to change target phase angles TGPAa according to engine speed NE and cell voltage VB.

Fig. 8 is illustrated the example changing target phase angles TGPAa based on engine speed NE and cell voltage VB, with Target phase angles TGPAa corresponding to the region of engine speed NE shown in Fig. 4 set in start in rotary speed area, target meter Calculation portion 503,603 changes target phase angles TGPAa based on cell voltage VB.

Specifically, in the change characteristic of target phase angles TGPAa of Fig. 8 illustration, identical with the characteristic shown in Fig. 4, send out The region of motivation rotating speed NE is divided into starts rotary speed area, idling speed region and region, three, moderate rotation region, is starting In the case of machine rotating speed NE meets idling speed region, moderate rotation region, target calculating part 503,603 is to illustrate with Fig. 4 Same property settings target phase angles TGPAa.

On the other hand, in the change characteristic of target phase angles TGPAa of Fig. 8 illustration, meet in engine speed NE and send out In the case of dynamic rotary speed area, target calculating part 503,603 changes target phase angles TGPAa according to cell voltage VB at this moment.

That is, the ambient temperature that can deduce battery in the case of cell voltage VB is higher than setting voltage is high, at battery It is arranged under electromotor indoor situations, can be deduced by ambient temperature height and be in the warming-up that the temperature of internal combustion engine 101 is higher Completion status.

On the other hand, the ambient temperature that can deduce battery in the case of cell voltage VB is less than setting voltage is low, Under battery is arranged on electromotor indoor situations, it is in low temperature by the low temperature that can deduce internal combustion engine 101 of ambient temperature ～the condition of high temperature.

Therefore, lower than setting voltage at cell voltage VB, deduce the situation that internal combustion engine 101 starts under a cold state Under, target calculating part 503,603 is so that the shut-in time IVC of inlet valve 105 is near lower dead center BDC, so that sucking sky Tolerance increases and then is able to ensure that the mode of starting performance, target setting phase angle TGPAa as much as possible.

On the other hand, higher than setting voltage at cell voltage VB, deduce internal combustion engine 101 and start under warming-up completion status In the case of, target calculating part 503,603 is with by making the shut-in time IVC of inlet valve 105 more prolong than cold post-start state Late and away from lower dead center BDC, so that effective compression ratio reduces and then can suppress to occur the mode of advanced ignition, set than electricity Cell voltage VB is less than the situation of setting voltage more by postponing target phase angles TGPAa of side.

Noting, although in the characteristic example shown in Fig. 8, target calculating part 503,603 is based on engine speed NE and battery Voltage VB is variably set target phase angles TGPAa, but target calculating part 503,603 can not use engine speed NE Information but be variably set target phase angles TGPAa based on cell voltage VB.

But, if operating variable valve timing apparatus 114 in the stopped process of internal combustion engine 101 to scheme to make rotatable phase send out Changing, it is likely that owing to motor torque can not overcome cam moment of torsion to make the phase place of reality not change, cause producing Raw locking electric current (ロッ Network stream) thus cause overheated, or become variable valve timing apparatus 114 or motor drive circuit goes out The main cause of existing fault, or occur motor output shaft to nip reducing gear etc. due to locking moment of torsion (ロッ Network ト Le Network) therefore Barrier.

Therefore, it can, by the structure shown in the functional block diagram of Fig. 9, send the VVT under CAN abnormality The instruction of the driving permission/license of device 114.

In the functional block diagram of Fig. 9, ECM201B have based on internal combustion engine 101 and vehicle-state be driven license judge The first detection unit 510 and be driven the most decidable second detection unit 511 as determining whether based on engine speed NE License drives the detection unit of variable valve timing apparatus 114.

Further, ECM201B has switching part 512, and this switching part 512 inputs the permission/license letter of the first detection unit 501 Number and the permission/license signal of the second detection unit 511, and diagnostic result based on CAN communication selects either one signal defeated Go out.

Further, the driving permission/license command signal that switching part 512 is exported via CAN211 to VTC controller 201A side is transmitted.

VTC controller 201A has the 3rd detection unit 611 and switching part 612, and the 3rd detection unit 611 is based on engine speed NE is driven license and judges, switching part 612 inputs the command signal of the driving permission/license come from the conveying of ECM201B side With the command signal of drivings permission/license of the 3rd detection unit 611 output, and diagnostic result based on CAN communication selects times The signal output of one side.

In the case of switching part 612 output drives the command signal of license, the drive control part of VTC controller 201A Variable valve timing apparatus 114 is driven controlling by 605 based on target phase angles, and drives not in switching part 612 output In the case of the command signal of license, the drive control part 605 of VTC controller 201A stops variable valve timing apparatus 114 Driving.

Note, as it was previously stated, drive control part 605 input target phase angles be according to CAN have selection without exception from In target phase angles that ECM201B transmission comes and the target phase angles that calculates of the 3rd target calculating part 603 either one and true Fixed desired value.That is, although Fig. 9 eliminating the record to the module for target setting phase angle, but its have Fig. 2, The structure of the target calculating part 603,503 etc. shown in Fig. 3, Fig. 7.

Further, the switching part 512 of ECM201B side selects under CAN normal condition and exports the driving of the first detection unit 510 The command signal of permission/license, selects and exports the driving permission/license of the second detection unit 511 under CAN abnormality Command signal.

Equally, the switching part 612 of VTC controller 201A side selects under CAN normal condition and exports from ECM201B side defeated The command signal of the driving permission/license sent here, selects and exports the driving of the 3rd detection unit 611 under CAN abnormality The command signal of permission/license.

It addition, input the data of engine speed NE that speed calculation portion 508 calculates in the second detection unit 511, to 3rd detection unit 611 inputs the data of engine speed NE that speed calculation portion 508 calculates.Further, the second detection unit 511 And the 3rd detection unit 611 export under internal combustion engine 101 halted state that engine speed NE is 0rpm driving objectionable instruction Signal, when engine speed NE is not 0rpm, admission cam shaft 115a rotation, output drives the command signal of license.

According to structure as shown in Figure 9, even if making VTC controller 201A side to be properly entered owing to CAN is abnormal The command signal of the driving permission/license set in ECM201B side, owing to selecting to sentence from the 3rd when CAN occurs abnormal Determine the instruction in portion 611, and be driven/stop driving, the most at least at internal combustion engine based on the instruction from the 3rd detection unit 611 The driving to variable valve timing apparatus 114 can be suppressed under the halted state of 101.

Therefore, when there is CAN exception under the halted state at internal combustion engine 101, it is possible to suppression is due to changeable air valve just Time the driving of mistake of device 114 and the generation of fault etc. of nipping of the overheating fault of drive circuit that causes or decelerator.

But, as it has been described above, when there is CAN exception, although VTC controller 201A is from from the transmission of ECM201B side Target phase angles switches to the target phase angles calculated by the 3rd target calculating part 603, utilizes drive control part 605 to continue can The driving of air valve variation advance/retard mechanism 114 controls, but target phase angles is likely sent out along with CAN generation exception step evolution Changing, causes the output etc. of internal combustion engine 101 to change tempestuously.

Therefore, as shown in Figure 10, by arranging under the target phase angular CAN abnormality from CAN normal condition The transition period that target phase angles changes at leisure, it is possible to the behavior in service of suppression internal combustion engine 101 occurs abnormal with CAN and dashes forward Become.

Specifically illustrate present disclosure above by reference to preferred implementation, but those skilled in the art obviously can base Various mode of texturing is chosen in basic fundamental thought and teaching in the present invention.

Although in the above-described embodiment exemplified with the VVT dress to the air valve correct-timing variable making inlet valve 105 Put the control of 114, it is apparent that the control device of the present invention and control method can be applied to make the valve timing of exhaust valve 110 The control of variable variable valve timing apparatus.

Furthermore it is possible to become according to engine speed region, cell voltage, engine speed change direction, engine speed Multiple combination in change amount is variably set target phase angles TGPAa.

It addition, the data communication between ECM201B and VTC controller 201A is not limited to communication based on CAN standard, and It is can suitably to use known various communications.

Description of reference numerals

101 ... internal combustion engine, 105 ... inlet valve, 109 ... bent axle, 114 ... VVT gear, 114a ... motor, 115a ... admission cam shaft, 201A ... VTC controller, 201B ... engine control module (ECM), 203 ... crankshaft angle sensor, 204 ... cam angle sensor, 210 ... motor rotation angle sensor, 211 ... CAN.

Claims (according to the amendment of treaty the 19th article)

1. a control device for internal combustion engine, the control instruction inputted by outside according to it controls to make the valve timing of internal combustion engine The control device of variable variable valve timing apparatus, it is characterised in that

Having process portion, this process portion is when the input of described control instruction occurs abnormal, by described variable valve timing apparatus The assigned position of the default location controlled to deviation machinery,

Described process portion according to engine speed, whether be the starting state of described internal combustion engine, the starting state of described internal combustion engine Under described internal combustion engine temperature at least one change described assigned position.

2. the control device of internal combustion engine as claimed in claim 1, it is characterised in that described process portion is many in engine speed Described assigned position is changed respectively in individual region.

3. the control device of internal combustion engine as claimed in claim 1, it is characterised in that described process portion is according to engine speed At least one party of change direction and variable quantity changes described assigned position.

4. the control device of internal combustion engine as claimed in claim 1, it is characterised in that

The exception of the input of described control instruction refers to the communication abnormality between second control device, described second control device Export described control instruction and control described internal combustion engine,

When there is described communication abnormality in described second control device, it is assumed that described variable valve timing apparatus is controlled to described Assigned position and carry out described internal combustion engine control process.

5. the control device of internal combustion engine as claimed in claim 1, it is characterised in that

Described variable valve timing apparatus is the device of the air valve correct-timing variable of the inlet valve making described internal combustion engine,

Described process portion is under the starting state of the temperature of the described internal combustion engine described internal combustion engine lower than set point of temperature, by described rule Location installs the position of the first shut-in time that shut-in time is lower for making described inlet valve, and in described Under the starting state of the described internal combustion engine that the temperature of combustion engine is higher than described set point of temperature, be set to described assigned position to make described in enter The shut-in time of valve than described first shut-in time more by postpone side position.

6. the control device of internal combustion engine as claimed in claim 1, it is characterised in that

Described variable valve timing apparatus is the device of the air valve correct-timing variable of the inlet valve making described internal combustion engine, described acquiescence position Put the position being to make shut-in time of described inlet valve after lower dead center,

Described process portion is under the starting state of described internal combustion engine, when described assigned position is set to the closedown making described inlet valve Between than described default location near the position of lower dead center.

7. the control device of internal combustion engine as claimed in claim 6, it is characterised in that described process portion is at described engine starting After idling mode under, described assigned position is set to the shut-in time the making described inlet valve position compared with dynamic state delay.

8. the control device of internal combustion engine as claimed in claim 7, it is characterised in that described process portion turning at described internal combustion engine Under the state that speed ratio idling speed is high, it is set to described assigned position make the shut-in time of described inlet valve than described idling mode Under shut-in time more by the position of side in advance.

9. the control device of internal combustion engine as claimed in claim 1, it is characterised in that

Described process portion, when described internal combustion engine starts to accelerate from idling mode, changes described assigned position so that described inlet valve Shut-in time than the shut-in time under idle running near lower dead center.

10. a control method for internal combustion engine, the control instruction inputted by outside according to it controls just make the valve of internal combustion engine Time variable variable valve timing apparatus method, it is characterised in that comprise:

Detect the described control instruction step with or without input exception；

When detecting that described input is abnormal, the rule of the default location described variable valve timing apparatus controlled to deviation machinery The step that location is put；

The step of described assigned position is changed according to engine speed.

Claims

Having process portion, this process portion is when the input of described control instruction occurs abnormal, by described variable valve timing apparatus The assigned position of the default location controlled to deviation machinery.

2. the control device of internal combustion engine as claimed in claim 1, it is characterised in that described process portion becomes according to engine speed More described assigned position.

3. the control device of internal combustion engine as claimed in claim 2, it is characterised in that described process portion is many in engine speed Described assigned position is changed respectively in individual region.

4. the control device of internal combustion engine as claimed in claim 2, it is characterised in that described process portion is according to engine speed At least one party of change direction and variable quantity changes described assigned position.

5. the control device of internal combustion engine as claimed in claim 1, it is characterised in that described process portion is according to described in being used for starting The voltage of the battery of internal combustion engine changes described assigned position.

6. the control device of internal combustion engine as claimed in claim 5, it is characterised in that described process portion rising at described internal combustion engine Under dynamic state, the voltage according to described battery changes described assigned position.

7. the control device of internal combustion engine as claimed in claim 1, it is characterised in that

8. the control device of internal combustion engine as claimed in claim 1, it is characterised in that

10. the control device of internal combustion engine as claimed in claim 9, it is characterised in that described process portion rises at described internal combustion engine Under idling mode after Dong, described assigned position is set to the shut-in time the making described inlet valve position compared with dynamic state delay Put.

The control device of 11. internal combustion engines as claimed in claim 10, it is characterised in that described process portion is at described internal combustion engine Under the state that rotating ratio idling speed is high, it is set to described assigned position make the shut-in time of described inlet valve than described idling shape Shut-in time under state is more by the position of side in advance.

The control device of 12. internal combustion engines as claimed in claim 1, it is characterised in that

The control method of 13. 1 kinds of internal combustion engines, the control instruction inputted by outside according to it controls just make the valve of internal combustion engine Time variable variable valve timing apparatus method, it is characterised in that comprise:

When detecting that described input is abnormal, the rule of the default location described variable valve timing apparatus controlled to deviation machinery The step that location is put.

The control method of 14. internal combustion engines as claimed in claim 13, it is characterised in that also comprise and change according to engine speed The step of described assigned position.

The control method of 15. internal combustion engines as claimed in claim 13, it is characterised in that also comprise according to for start described in The voltage of the battery of combustion engine changes the step of described assigned position.